buggy add

src/db.rs

@@ -1,7 +1,7 @@
 use std::collections::HashSet;
 
 use std::fs;
-use std::io::{self, BufRead};
+use std::io::{self, Write, BufRead};
 
 
 pub struct DB {
@@ -29,9 +29,18 @@ impl DB {
         Ok(result)
     }
     
-    //pub fn dump(&self) {
+    pub fn dump(&self, path: &str) -> io::Result<()> {
-        // TODO: implement
+        let mut file = fs::OpenOptions::new()
-    //}
+            .write(true)
+            .append(false)
+            .open(path)?;
+
+        for id in self.items.iter() {
+            writeln!(file, "{}", id)?;
+        }
+
+        Ok(())
+    }
  }
 
 

src/main.rs

@@ -69,12 +69,9 @@ fn add(id: &String) -> io::Result<()> {
             format!("Dublicate item id: {}. Item id's must be unique.", id)
         ))
     }
-    let mut file = fs::OpenOptions::new()
-        .write(true)
-        .append(true)
-        .open(STORAGE_PATH)?;
 
-    writeln!(file, "{}", id)?;
+    db.dump(STORAGE_PATH)?;
+    
     Ok(())
 }